Chemical Engineering MCQs

Page No. 166

Viscosity of water is about _____________ times that of air at room temperature?


a15


b55


c155


d1050


View Answer 55

A hydraulic ram acts as a/an ______________ pump?


aCentrifugal


bReciprocating


cImpulse


dParallel cylinder


View Answer Impulse

In fluid flow, the stagnation point is defined as a point, where the _____________ is zero?


aFlow velocity


bPressure


cTotal energy


dAll A., B. and C.


View Answer Flow velocity

During ageing of fluid carrying pipes, the__________________?


aPipe becomes smoother with use


bFriction factor increases linearly with time


cAbsolute roughness decreases with time


dAbsolute roughness increases linearly with time



Creeping flow around a sphere is defined, when particle Reynolds number is___________________?


a< 2100


b< 0.1


c> 2.5


d< 500


View Answer < 0.1

Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of ______________ pressure?


aSmall differential


bAtmospheric


cAbsolute


dGage


View Answer Small differential

Which is not a variable head meter _________________?


aVenturimeter


bPitot tube


cRotameter


dNone of these


View Answer Rotameter

Power requirement of fans having constant wheel diameter varies _____________ fan speed?


aAs square of


bDirectly as


cAs cube of


dNone of these


View Answer As cube of

For a reciprocating pump, the indicator diagram is the graph between the________________?


aDischarge and overall efficiency


bVolume swept by piston for one complete revolution and the pressure in the cylinder


cAngle swept by the crank pin at any instant and the discharge


dNone of these



Efficiency of power transmission (ε) through a circular pipe is given by (ht – hf)/ht, which has a maximum value of _____________ percent?


a33:3


b50


c66.6


d88.8


View Answer 66.6

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